/*
 * Interrupt handling functions
 *
 * Copyright (c) 2019 Virtuozzo International GmbH
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met :
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and / or other materials provided with the distribution.
 * 3. Neither the names of the copyright holders nor the names of their contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "precomp.h"
#include "viosock.h"

#if defined(EVENT_TRACING)
#include "IsrDpc.tmh"
#endif

BOOLEAN
VIOSockInterruptIsr(
    IN WDFINTERRUPT Interrupt,
    IN ULONG MessageID)
{
    PDEVICE_CONTEXT pContext = GetDeviceContext(WdfInterruptGetDevice(Interrupt));
    WDF_INTERRUPT_INFO info;

    TraceEvents(TRACE_LEVEL_VERBOSE, DBG_INTERRUPT, "--> %s\n", __FUNCTION__);

    WDF_INTERRUPT_INFO_INIT(&info);
    WdfInterruptGetInfo(Interrupt, &info);

    if (VirtIOWdfGetISRStatus(&pContext->VDevice) > 0)
    {
        WdfInterruptQueueDpcForIsr(Interrupt);
        return TRUE;
    }

    TraceEvents(TRACE_LEVEL_VERBOSE, DBG_INTERRUPT,"<-- %s, interrupt not serviced\n", __FUNCTION__);

    return FALSE;
}

VOID
VIOSockInterruptDpc(
    IN WDFINTERRUPT Interrupt,
    IN WDFOBJECT AssociatedObject)
{
    WDFDEVICE Device = WdfInterruptGetDevice(Interrupt);
    PDEVICE_CONTEXT Context = GetDeviceContext(Device);
    WDF_INTERRUPT_INFO info;

    TraceEvents(TRACE_LEVEL_VERBOSE, DBG_DPC, "--> %s\n", __FUNCTION__);

    WDF_INTERRUPT_INFO_INIT(&info);
    WdfInterruptGetInfo(Context->WdfInterrupt, &info);

    TraceEvents(TRACE_LEVEL_VERBOSE, DBG_DPC, "<-- %s\n", __FUNCTION__);
}

NTSTATUS
VIOSockInterruptEnable(
    IN WDFINTERRUPT Interrupt,
    IN WDFDEVICE AssociatedDevice)
{
    PDEVICE_CONTEXT Context = GetDeviceContext(WdfInterruptGetDevice(Interrupt));

    UNREFERENCED_PARAMETER(AssociatedDevice);

    TraceEvents(TRACE_LEVEL_INFORMATION, DBG_INTERRUPT, "--> %s\n", __FUNCTION__);

    TraceEvents(TRACE_LEVEL_INFORMATION, DBG_INTERRUPT, "<-- %s\n", __FUNCTION__);
    return STATUS_SUCCESS;
}

NTSTATUS
VIOSockInterruptDisable(
    IN WDFINTERRUPT Interrupt,
    IN WDFDEVICE AssociatedDevice)
{
    PDEVICE_CONTEXT Context = GetDeviceContext(WdfInterruptGetDevice(Interrupt));
    UNREFERENCED_PARAMETER(AssociatedDevice);

    TraceEvents(TRACE_LEVEL_INFORMATION, DBG_INTERRUPT, "--> %s\n", __FUNCTION__);

    TraceEvents(TRACE_LEVEL_INFORMATION, DBG_INTERRUPT, "<-- %s\n", __FUNCTION__);
    return STATUS_SUCCESS;
}
